ELI5 Toothpaste - how did people brush before toothpaste?

ELI5 Toothpaste - how did people brush before toothpaste?

Author: ELI5 Explain Like I'm Five Podcast March 10, 2023 Duration: 9:24
How did people maintain their teeth before toothpaste? If the first modern toothpastes were not sold in tubes, what were they sold in? When did they add fluoride? Why can't our teeth heal like our skin and bones? .. we explain like I'm five Thank you to the r/explainlikeimfive community and in particular the following users whose questions and comments formed the basis of this discussion: dude-e, wenchister, the-illusiveman, duplojamaal, nemesis24k, perseus_turambar, who_cares_about_name and radbadtad To the ELI5 community that has supported us so far, thanks for all your feedback and comments. Join us on Twitter: https://www.twitter.com/eli5ThePodcast/ or send us an e-mail: ELI5ThePodcast@gmail.com

Ever find yourself wondering about something seemingly simple, but the answers online are full of jargon? That's where ELI5 Explain Like I'm 5: Bite sized answers to stuff you should know about-in a mini podcast comes in. Each episode grabs a curious question-maybe why the sky is blue, how electricity actually works, or the history behind a common tradition-and breaks it down into clear, digestible pieces. The aim is genuine understanding, not just a quick fact. Sourced from the vibrant curiosity of the Reddit community, this podcast transforms those everyday "how" and "why" mysteries into short, focused conversations. You'll hear about topics spanning science, culture, society, and our planet, all explained as if to a bright five-year-old, which turns out to be the perfect clarity level for anyone. It’s for the casually inquisitive, the lifelong learner, or anyone who just wants a straightforward answer without the lecture. Tune in for a few minutes and come away a little more informed about the world, one simple explanation at a time.
Author: Language: English Episodes: 100

ELI5 Explain Like I'm 5: Bite sized answers to stuff you should know about - in a mini podcast
Podcast Episodes
ELI5 Antimicrobial Surfaces - how can a surface clean itself? [not-audio_url] [/not-audio_url]

Duration: 6:47
How are they and other surfaces you see around in public places considered antimicrobial without cleaning them? What does it even mean to be antimicrobial? How exactly does silver and copper kill bacteria? What did ancie…
ELI5 Airport Security - why we have a 100ml fluid limit? [not-audio_url] [/not-audio_url]

Duration: 8:21
Why do we have a limit on the amount of hand carry liquids when we travel, and how is the fluid limit in airports an effective security measure? How was the TSA formed? Are those full body scanners at airports safe? ...…
ELI5 Megalodon - how are we sure they are extinct? [not-audio_url] [/not-audio_url]

Duration: 6:41
How are scientists so sure that the Megalodon is extinct? Especially since I keep on hearing them say we’ve explored less than 5% of the earth’s deepest oceans? What did they look like? Where did they live? How did they…
ELI5 Port and Starboard - why not just left and right? [not-audio_url] [/not-audio_url]

Duration: 6:34
Why do ships use “port” and “starboard” instead of “left” and “right?” Where did the terms originate? What does “aft” mean and why is it different from the stern? Why do large ships have their anchors in the bow and not…
ELI5 Energy Drinks - what’s in them beyond caffeine? [not-audio_url] [/not-audio_url]

Duration: 7:08
What in energy drinks provides stimulus over and above that from caffeine? Are they superior to coffee or tea? How did Pepsi and Coca Cola start out as energy drinks? Why are their health warning labels on some energy dr…
ELI5 Laughing Gas - why is N20 called laughing gas? [not-audio_url] [/not-audio_url]

Duration: 7:01
What happens inside your brain when you inhale nitrous oxide? Why is it called laughing gas? When did we start using laughing gas for medical use cases? Is it safe? ... we explain like I'm five Thank you to the r/explain…
ELI5 Sinkholes - how do they happen? [not-audio_url] [/not-audio_url]

Duration: 7:30
How do sinkholes happen? What exactly are they? What are Cenotes? Why do sinkholes have so many different names around the world? What is the deepest sinkhole in the world? ... we explain like I'm five Thank you to the r…
ELI5 GPS - how is GPS a free service? [not-audio_url] [/not-audio_url]

Duration: 8:39
How is GPS free? How is it profitable for companies to offer services like navigation without subscription fees or ads? Why did the US government open GPS up to the public? Why does GPS work even when underground and in…
ELI5 Fusion - what is nuclear fusion and why is it important? [not-audio_url] [/not-audio_url]

Duration: 6:43
What is nuclear fusion and how is it significant to us? How is it different to nuclear fission? What is the significance of the recent news that we have reached ‘ignition’ of nuclear fusion? ... we explain like I'm five…
ELI5 Balloons - why is there a ring at the opening of a balloon? [not-audio_url] [/not-audio_url]

Duration: 7:29
Why is there a ring at the end of the opening of a balloon? What creates the noise of a ballon popping? Who invented the ballon? Why do helium balloons shrink in size over time? .. we explain like I'm five Thank you to t…